JPH0623485A - Manufacture of drawing wire rod - Google Patents

Abstract

PURPOSE:To improve the surface structure of a continuously cast rod, to improve the wire drawability with warm-rolling by applying the wire drawing to the continuously cast rod by applying a drawing work to the continuously cast rod while producing the alloy-made continuously cast rod for forging with the continuous casting method. CONSTITUTION:By using a horizontal type continuous casting device 1, at first, the Ni-based alloy-made continuously cast rod 3 is cast through a water cooling mold 2 and intermittently pulled out at every prescribed length with pinch rolls 4 to continuously cast a round bar-like continuously cast rod 3. Successively, in the condition of heating the continuously cast rod 3 by a high frequency heating device 5, after wire-drawing the continuously cast rod 3 by hot-rolling while improving the roundness by passing through roller dies 6, the produced wire is taken up as coil state to obtain a welding wire 10. Successively, the wire drawing is executed through a die 11 for wire drawing and heat treatment and the wire drawing are repeatedly executed untill obtaining the welding wire having a prescribed size. In such a manner, by intermediately drawing out it at the time of continuous casting, the appearance of the welding wire is formed in a good condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is, for example, a Ni-based alloy (Hastelloy C-22, Hastelloy C-276, Inconel 625, etc.), a Co-based alloy or a Fe-based alloy made of a forging alloy (Wrough Alloy). The present invention relates to a method for manufacturing a drawn wire material.

[0002]

2. Description of the Related Art Generally, forging alloys of this kind are poor in continuous castability as compared with casting alloys such as stellite because the molten metal has a large viscosity and a solidification temperature range is small. Therefore, conventionally, when manufacturing a wire drawing material made of such a forging alloy, first, an ingot is manufactured by melting, and after ingot forging this ingot, chamfering, cutting and further pressing, hammer Etc. to forge into a round bar with a specified diameter, then (face cutting) cutting to align to a specified length,
Further, this is hot-rolled by a groove roll to form a coil, and subsequently, cold wire drawing treatment (heat treatment, wire drawing) is repeated to obtain a wire drawn material having a predetermined diameter.

[0003]

However, when a wire drawing material made of a forging alloy is manufactured in this manner, it takes a lot of processing man-hours and the yield of the product is low, so that it takes a long time to manufacture the product. There is a problem that it takes a long time and the manufacturing cost increases. Therefore, in order to solve this problem, as a result of diligent studies by the present inventors, while continuously producing a continuous casting rod made of forging alloy using the continuous casting method,
It was confirmed that by directly performing wire drawing on this continuous cast rod, it is possible to omit the conventional steps of slab forging → face cutting, cutting → forging → (face cutting) cutting → hot rolling.

The present invention has been made on the basis of the above-mentioned findings. The object of the present invention is to significantly reduce the processing man-hours, improve the product yield, and shorten the manufacturing time. Another object of the present invention is to provide a method for manufacturing a wire drawing material which can be manufactured at a low cost.

[0005]

In order to achieve the above object, according to claim 1 of the present invention, a continuous casting rod made of an alloy for forging is manufactured by a continuous casting method, and the continuous casting rod is wire-drawn. Is applied to make a thin line. In addition, claim 2 of the present invention
Is for heating the continuous casting rod before the wire drawing process.
Further, according to claim 3 of the present invention, after continuously drawing a continuously cast rod, wire drawing is performed, and then cold drawing is further performed.

[0006]

According to the first aspect of the present invention, by subjecting the continuously cast rod that is continuously cast to wire drawing, the surface structure of the continuously cast rod is improved, and warm rolling is performed. Drawability is improved. Further, according to claim 2 of the present invention, by heating the continuous casting rod, the structure of the continuous casting rod can be improved, and hot rolling can be performed to further improve the wire drawing workability. . Further, according to claim 3 of the present invention, in the case where only the wire drawing process performed during continuous casting is insufficient,
A desired wire drawing material is obtained by performing cold wire drawing treatment.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In this example, a Ni-based alloy (Hastelloy C-22, Hastelloy C-276, Inconel 6
The case of manufacturing the weld line made in 25) will be described in detail.

In the figure, reference numeral 1 is a horizontal continuous casting equipment. In this horizontal continuous casting equipment 1, a continuous casting rod 3 cast through a water-cooled mold 2 is intermittently pulled out by a pinch roll 4. It is a thing. A high frequency heating device 5 and a roller die 6 are sequentially arranged on the downstream side of the pinch roll 4.

Using the horizontal continuous casting facility 1 constructed as described above, first, a Ni-based alloy (Hastelloy C-22,
A continuous casting rod 3 made of Hastelloy C-276, Inconel 625) is cast through a water-cooled mold 2 to form a pinch roll 4.
Intermittently pull out every predetermined length. This allows
A round rod-shaped continuous casting rod 3 having a diameter of 8 mm to 2.6 mm is continuously cast.

Next, the continuous casting rod 3 is attached to the high frequency heating device 5
In the state where the continuous casting rod 3 is heated by the above, the continuous casting rod 3 is drawn by hot rolling while being improved in roundness by being passed through a roller die 6, and then wound into a coil shape to be welded.
Get 0. The continuous casting rod 3 may be heated by electric heating instead of the high frequency heating. Also,
The high frequency heating device 5 may not be provided, and in this case, the continuous casting rod 3 is drawn by the roller die 6 by warm rolling. Welding line 1
Although 0 may be obtained, if the above-mentioned wire drawing is insufficient, cold drawing is further performed. This cold wire drawing treatment is a heat treatment (heating temperature of at least 1000 ° C. or higher “melting point −35
0 ° C. to melting point −50 ° C. ”, heating time at least 10 minutes or more, followed by water cooling), followed by wire drawing with the wire drawing die 11, and desired size (diameter 2.4 mm).
The above heat treatment and wire drawing are repeated until a welding line of 1 to 2 mm) is obtained. In the cold wire drawing treatment, rolling work with rollers may be performed instead of drawing work with the wire drawing die 11.

In the welding line produced in this way, by intermittently drawing it out during continuous casting, it is possible to completely eliminate the traces called witness marks formed on the surface of the continuous casting rod 3 at predetermined intervals. As a result, a good appearance of the weld line could be formed, and a uniform and desired quality product was obtained.

[0012]

As described above, according to the first aspect of the present invention.
Is a continuous casting rod made of an alloy for forging by a continuous casting method, and is drawn into a fine wire by subjecting the continuous casting rod to a wire drawing. It is possible to improve the surface structure of the continuous casting rod, and to perform warm rolling to improve the wire drawing workability, and it is possible to greatly reduce the number of working steps. The product yield can be improved, the manufacturing time can be shortened, and the manufacturing cost can be reduced. Further, since claim 2 of the present invention heats the continuous casting rod before the wire drawing, the structure of the continuous casting rod can be improved by heating the continuous casting rod, and It is possible to carry out hot rolling to further improve the wire drawing workability. Further, according to claim 3 of the present invention, since the continuous casting rod that is continuously cast is subjected to wire drawing, and then subjected to cold wire drawing treatment, wire drawing performed during continuous casting is performed. When it is not sufficient to perform the drawing, cold drawing treatment can be performed to obtain a wire drawing material having desired quality and dimensions.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

[Explanation of symbols]

 1 Horizontal continuous casting equipment 2 Water-cooled mold 3 Continuous casting rod 4 Pinch roll 5 High frequency heating device 6 Roller die 10 Welding wire 11 Drawing wire die

Claims (3)

[Claims] 1. A method of manufacturing a wire drawing material, characterized in that while the continuous casting rod made of an alloy for forging is manufactured by a continuous casting method, the continuous casting rod is subjected to a wire drawing process to be thinned. 2. The method for producing a wire drawing material according to claim 1, wherein the continuously cast rod is heated before the wire drawing process. 3. The method for producing a wire-drawn material according to claim 1, wherein after the continuously-cast rod that has been continuously cast is subjected to wire drawing, cold drawing is further performed.